scholarly journals Nanoscale Wear Law: Non‐Empirical Law for Nanoscale Atom‐by‐Atom Wear (Adv. Sci. 2/2021)

2021 ◽  
Vol 8 (2) ◽  
pp. 2170010
Author(s):  
Yang Wang ◽  
Jingxiang Xu ◽  
Yusuke Ootani ◽  
Nobuki Ozawa ◽  
Koshi Adachi ◽  
...  
Keyword(s):  
Empirical Law ◽  
Nanoscale Wear ◽  
Wear Law

Effects of the MnO additives on the properties of Pb(Fe2∕3W1∕3)–PbTiO3 relaxors: Comparison of empirical law and experimental results

2007 ◽  
Vol 101 (5) ◽  
pp. 054117 ◽  
Author(s):  
Cheng-Shong Hong ◽  
Sheng-Yuan Chu ◽  
Wen-Chang Su ◽  
Ren-Chuan Chang ◽  
Hsiau-Hsian Nien ◽  
...  
Keyword(s):  
Experimental Results ◽  
Empirical Law

Viscosity of Lennard-Jones mixtures: A systematic study and empirical law

2018 ◽  
Vol 148 (23) ◽  
pp. 234506 ◽  
Author(s):  
N. Meyer ◽  
J.-F. Wax ◽  
H. Xu
Keyword(s):  
Systematic Study ◽  
Lennard Jones ◽  
Empirical Law

Finite Element Analysis of a Polymer- Polymer Sliding Contact for Schallamach Wave and Wear

2007 ◽  
Vol 348-349 ◽  
pp. 633-636 ◽  
Author(s):  
Muhammad Azeem Ashraf ◽  
Bijan Sobhi-Najafabadi ◽  
Özdemir Göl ◽  
D. Sugumar
Keyword(s):  
Finite Element ◽  
Polymer Surface ◽  
Sliding Contact ◽  
Quasi Steady State ◽  
Nodal Solutions ◽  
Element Analysis ◽  
Steady State Analysis ◽  
Initiation And Propagation ◽  
Wear Law ◽  
Nodal Level

Sliding polymer-polymer surface contacts, due to their inherent elastic properties, exhibit detachment waves also termed as Schallamach waves. Such waves effect the initiation and propagation of wear along the sliding contacts. This paper presents quasi steady-state analysis of such a sliding contact using finite element. The contact is modeled and nodal solutions for pressure are obtained for small sliding steps. Analysis of orthogonal pressure components at the contact nodes reveals the formation of Schallamach wave phenomenon. Further, appropriate wear law is used for calculation of wear at nodal level.

Nanoscale Wear Layers on Silicon Wafers Induced by Mechanical Chemical Grinding

2017 ◽  
Vol 65 (4) ◽  
Author(s):  
Zhenyu Zhang ◽  
Yuefeng Du ◽  
Bo Wang ◽  
Ziguang Wang ◽  
Renke Kang ◽  
...  
Keyword(s):  
Silicon Wafers ◽  
Nanoscale Wear

Analytical and experimental research on erosion wear law of drill pipe in gas drilling

2017 ◽  
Vol 79 ◽  
pp. 615-624 ◽  
Author(s):  
Zhiqiang Huang ◽  
Dou Xie ◽  
Xiaobing Huang ◽  
Gang Li ◽  
Song Xie
Keyword(s):  
Experimental Research ◽  
Drill Pipe ◽  
Erosion Wear ◽  
Gas Drilling ◽  
Wear Law

scholarly journals Empirical Law and Economics Scholarship in China: Methodologies and Challenges

2017 ◽  
Vol 4 (2) ◽  
pp. 329-348 ◽  
Author(s):  
Ruoying CHEN
Keyword(s):  
Law And Economics ◽  
Qualitative Studies ◽  
Future Research ◽  
Academic World ◽  
Empirical Law ◽  
Chinese Scholars ◽  
Social Scientific ◽  
Analyze Data

AbstractProviding a survey of empirical law and economics scholarship in China, this paper shows the binary categories of quantitative versus qualitative studies are inadequate. Instead, two paths for future research in empirical law and economics in China are identified, namely studies based upon individual cases and studies that apply social scientific tools to analyze data, such as statistical and experimental tools. This paper also emphasizes the unique value of empirical law and economics for Chinese scholars in the increasingly globalized academic world.

Use of Archard’s Wear Law for the Calculation of Uniform Wheel Wear of High Tonnage Freight Vehicles

2013 ◽  
Author(s):  
Carlos Casanueva ◽  
Per-Anders Jönsson ◽  
Sebastian Stichel
Keyword(s):  
Contact Point ◽  
Wheel Wear ◽  
Contact Conditions ◽  
Passenger Vehicles ◽  
Calculation Methodology ◽  
Wear Calculation ◽  
Wheel Profile ◽  
Wear Law ◽  
Equivalent Conicity ◽  
Freight Vehicles

Wheel profile evolution has a large influence on track and wheelset related maintenance costs. It influences important parameters such as equivalent conicity or contact point positioning, which will affect the dynamic behavior of the vehicle, in both tangent track and curve negotiation. High axle loads in freight wagons may increase both the wheel wear and the damage caused by vehicles with both new and already worn profiles. A common profile in Europe is the S1002 profile, developed for rail inclination 1/40. In Sweden rail inclination is 1/30, so contact conditions might not be optimal. The presented work uses Archard’s wear law to analyze the profile wear evolution in a two axle freight vehicle with Unitruck running gear on the Swedish network. This wear calculation methodology has been successfully used to predict uniform wear in passenger vehicles. First, the vehicle model has been optimized in order to improve the speed of the wear simulations. Experimental measurements of wheel profiles have been performed in order to validate the simulations. The conclusion is that the wear methodology successfully used to predict uniform wheel wear in passenger vehicles cannot be directly applied for the calculation of wheel profile evolution in high tonnage freight vehicles. The influence of block brakes or switches and crossings cannot be dismissed when calculating uniform wheel wear in these cases.

scholarly journals A Semi-empirical Law for Sputtering in Plasma Devices

1982 ◽  
Vol 35 (6) ◽  
pp. 699
Author(s):  
JL Cook ◽  
EK Rose ◽  
JW Connolly
Keyword(s):  
Helium Isotope ◽  
General Law ◽  
Empirical Law ◽  
Semi Empirical

A general law is given for sputtering coefficients as a function of the energy of hydrogen and helium isotope ions incident on metallic and graphite walls and limiters. The average over a Maxwellian spectrum is performed analytically.

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